基于CBR汽车检具智能设计系统的研究与开发

发布时间：2018-05-23 19:31

本文选题：汽车检具 + 智能设计　；参考：《江苏大学》2017年硕士论文

【摘要】：汽车检具在快速、准确检测零部件精度、确保整车质量中发挥着重要作用。然而,汽车检具设计过程普遍缺乏规范化,目前还停留在凭经验手工操作通用CAD系统或二次开发局部参数化CAD模块进行设计的方式上,难以实质性地提高设计质量与效率。因此,开发汽车检具智能设计系统已成为汽车行业发展的迫切需求。本文在CATIA软件平台上开发了基于CBR的汽车检具智能设计系统,其主要工作内容进展如下:首先对原型系统进行了需求分析,在这基础上构建系统的基本框架及其所需要的辅助支撑技术,搭建整个系统的软件平台,并对系统的四大模块界面显示模块、检索模块、修正和保存模块、输出模块进行了功能设计。其次对原型系统中的CBR关键技术进行了研究,提出了汽车检具检测特征、定位特征、夹紧特征和辅助特征实例表示方法和存储机制,并在此基础上,运用面向对象的方法来表达汽车检具设计实例。区别于加权最近邻算法,提出将基于隶属函数的相似度检索算法应用于汽车检具设计的实例检索中,并设计了一种“初步检索—推理检索”的分布式检索方法,极大的提高了检索的效率。对于实例特征项的权重确定问题,结合用户的设计经验,采用主观裁定的方法,避免了有些系统确定权重时的复杂性和不准确性,收到了很好的效果。然后基于CATIA V5R19和Microsoft Visual Studio 2005软件平台,充分应用CAA API接口函数和C++语言相结合的方式进行二次开发,基于关系型数据库Microsoft Office Access 2003的开发,并针对汽车检具智能设计的整个流程,在前面的基础上,在RADE环境下编写程序,编译,调试,运行程序,最后发布系统,开发出了汽车检具智能设计系统,系统分为权重设定模块、实例检索模块、实例修正与保存模块、实例输出模块四大模块和良好的人机交互式界面,实现了汽车检具智能设计的整个过程,包括相似汽车检具的检索、实例的修正和保存,检具2D工程图以及物料清单/BOM输出等功能。最后运用本文开发的汽车检具智能设计系统设计了某汽车检具公司的汽车前保险杠侧进风罩检具,检索出了与其相似的最佳实例并进行了修正和保存,达到了预期的设计要求,并自动生成了该检具的2D工程图和物料清单/BOM。实践证明本文开发的汽车检具智能设计系统稳定可靠。
[Abstract]:Automobile inspection tools play an important role in measuring the accuracy of parts and ensuring the quality of the whole vehicle quickly and accurately. However, there is a general lack of standardization in the design process of vehicle inspection tools. At present, it is difficult to improve the quality and efficiency of design because of the manual operation of the general CAD system by experience or the secondary development of local parametric CAD module. Therefore, the development of intelligent design system has become an urgent need for the development of automobile industry. In this paper, an intelligent design system of vehicle inspection tools based on CBR is developed on the platform of CATIA. The main work progress is as follows: firstly, the requirements of the prototype system are analyzed. On this basis, the basic framework of the system and its supporting technology are built, the software platform of the whole system is built, and the four modules of the system are displayed, retrieval module, correction and preservation module. The output module is designed. Secondly, the key technology of CBR in the prototype system is studied, and an example representation method and storage mechanism of the detection feature, location feature, clamping feature and auxiliary feature are proposed. An object-oriented method is used to express the design examples of vehicle inspection tools. Different from the weighted nearest neighbor algorithm, the similarity retrieval algorithm based on membership function is applied to the case retrieval of vehicle inspection design, and a distributed retrieval method called "preliminary Retrieval and reasoning Retrieval" is designed. The efficiency of retrieval is greatly improved. For the problem of weight determination of case feature items, combined with the user's design experience and subjective decision method, the complexity and inaccuracy of weight determination in some systems are avoided, and good results are obtained. Based on the software platform of CATIA V5R19 and Microsoft Visual Studio 2005, the second development is carried out by the combination of CAA API interface function and C language, based on the development of relational database Microsoft Office Access 2003, and aiming at the whole process of intelligent design of vehicle inspection tools, On the basis of the above, the program is compiled, debugged, run in RADE environment. Finally, the intelligent design system of vehicle inspection is developed. The system is divided into weight setting module and instance retrieval module. The whole process of intelligent design of vehicle inspection tools is realized, including the retrieval of similar vehicle inspection tools, the modification and preservation of examples, and the good man-machine interactive interface between the four modules of the case correction and saving module, the case output module and the example correction and preservation module, and the whole process of intelligent design of vehicle inspection tools is realized. Check 2 D engineering drawings and BOM / BOM output functions. In the end, the intelligent design system of automobile inspection device developed in this paper is used to design the automobile front bumper sideway inlet hood of a certain automobile inspection company, and the similar best examples are retrieved, modified and preserved, and the expected design requirements are achieved. The 2D engineering drawings and bill of materials are automatically generated. The practice proves that the intelligent design system of automobile inspection tools developed in this paper is stable and reliable.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.52;U472.9

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